diff --git a/ChangeLog b/ChangeLog
index 1281138..3e2ea6b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,10 @@
 
 = mbed TLS 2.x branch
 
+Features
+   * Support for platform abstraction of the standard C library time()
+     function.
+
 Bugfix
    * Fix bug in mbedtls_mpi_add_mpi() that caused wrong results when the three
      arguments where the same (in-place doubling). Found and fixed by Janos
diff --git a/include/mbedtls/platform.h b/include/mbedtls/platform.h
index 7922e8c..69a6afd 100644
--- a/include/mbedtls/platform.h
+++ b/include/mbedtls/platform.h
@@ -44,6 +44,7 @@
 #if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS)
 #include <stdio.h>
 #include <stdlib.h>
+#include <time.h>
 #if !defined(MBEDTLS_PLATFORM_STD_SNPRINTF)
 #if defined(_WIN32)
 #define MBEDTLS_PLATFORM_STD_SNPRINTF   mbedtls_platform_win32_snprintf /**< Default snprintf to use  */
@@ -243,7 +244,7 @@
  * The function pointers for time
  */
 #if defined(MBEDTLS_PLATFORM_TIME_ALT)
-extern time_t (*mbedtls_time)( mbedtls_time_t* time );
+extern mbedtls_time_t (*mbedtls_time)( mbedtls_time_t* time );
 
 /**
  * \brief   Set your own time function pointer
@@ -252,7 +253,7 @@
  *
  * \return              0
  */
-int mbedtls_platform_set_time( mbedtls_time_t (*time_func)( mbedtls_time_t time ) );
+int mbedtls_platform_set_time( mbedtls_time_t (*time_func)( mbedtls_time_t* time ) );
 #else
 #if defined(MBEDTLS_PLATFORM_TIME_MACRO)
 #define mbedtls_time    MBEDTLS_PLATFORM_TIME_MACRO
diff --git a/library/platform.c b/library/platform.c
index e7ec0ad..89a2bd6 100644
--- a/library/platform.c
+++ b/library/platform.c
@@ -198,15 +198,15 @@
 static mbedtls_time_t platform_time_uninit( mbedtls_time_t* timer )
 {
     ((void) timer);
-    return( NULL );
+    return( 0 );
 }
 
 #define MBEDTLS_PLATFORM_STD_TIME   platform_time_uninit
 #endif /* !MBEDTLS_PLATFORM_STD_TIME */
 
-time_t (*mbedtls_time)( mbedtls_time_t* timer ) = MBEDTLS_PLATFORM_STD_TIME;
+mbedtls_time_t (*mbedtls_time)( mbedtls_time_t* timer ) = MBEDTLS_PLATFORM_STD_TIME;
 
-int mbedtls_platform_set_exit( mbedtls_time_t (*time_func)( mbedtls_time_t timer ) )
+int mbedtls_platform_set_time( mbedtls_time_t (*time_func)( mbedtls_time_t* timer ) )
 {
     mbedtls_time = time_func;
     return( 0 );
diff --git a/library/version_features.c b/library/version_features.c
index 1575e09..b852ca8 100644
--- a/library/version_features.c
+++ b/library/version_features.c
@@ -54,6 +54,9 @@
 #if defined(MBEDTLS_PLATFORM_EXIT_ALT)
     "MBEDTLS_PLATFORM_EXIT_ALT",
 #endif /* MBEDTLS_PLATFORM_EXIT_ALT */
+#if defined(MBEDTLS_PLATFORM_TIME_ALT)
+    "MBEDTLS_PLATFORM_TIME_ALT",
+#endif /* MBEDTLS_PLATFORM_TIME_ALT */
 #if defined(MBEDTLS_PLATFORM_FPRINTF_ALT)
     "MBEDTLS_PLATFORM_FPRINTF_ALT",
 #endif /* MBEDTLS_PLATFORM_FPRINTF_ALT */